A method for smelting manganese-ferroalloy by heating manganese ore with microwave

A ferromanganese alloy and microwave heating technology, which is applied in the field of metallurgy, can solve the problems of slow heating rate and long heating time, and achieve the effects of promoting reaction, fast heating rate and reducing production cost

Active Publication Date: 2017-08-08
UNIV OF SCI & TECH BEIJING
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of slow heating rate and long heating time in the existing ferroalloy heating process, and provide a method for smelting ferromanganese alloy by using microwave heating manganese ore

Method used

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  • A method for smelting manganese-ferroalloy by heating manganese ore with microwave
  • A method for smelting manganese-ferroalloy by heating manganese ore with microwave
  • A method for smelting manganese-ferroalloy by heating manganese ore with microwave

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example 1

[0029] Example 1: In order to verify the microwave absorption characteristics of raw materials in the microwave field, microwaves with a power of 4KW and a frequency of 2.45GHZ were used to heat Brazil sintered ore, South African lump manganese ore, Chenzhou lump manganese ore, coke, etc., and the microwave power of a single raw material was 4KW, and the frequency was 2.45GHZ. The comparison of the heating characteristics in the microwave field is shown in Table 4, and the heating curve is shown in figure 1 . Depend on figure 1 It can be seen from Table 4 that the four raw materials for smelting ferromanganese can be heated in microwave, and all have good microwave absorption properties, and can quickly heat up in a short time, indicating that it is feasible to use microwave to heat ferroalloy raw materials.

[0030] Table 4 Comparison of heating characteristics of a single raw material

[0031]

Embodiment 2

[0032] Embodiment 2: set the microwave power to 4KW, and the frequency is 2.45GHZ, weigh 1kg of raw materials according to the batching method in Table 2, the oxygen-carbon molar ratio in the batching is 1:1.5, put the raw materials into the inside of the crucible naturally and loosely, and start heating. Raise the temperature to 1450°C, adjust the microwave power to enter the heat preservation mode, and keep the heat for 60 minutes to smelt ferromanganese. After the heat preservation is over, turn off the microwave and cool down.

Embodiment 3

[0033] Embodiment 3: Set the microwave power to 4KW, the frequency to 2.45GHZ, weigh 1.5kg of raw materials according to the batching method in Table 2, the oxygen-carbon molar ratio in the batching is 1:1.6, put the raw materials into the crucible naturally and loosely, and start heating , raise the temperature to 1500°C, adjust the microwave power to enter the heat preservation mode, hold the heat for 90 minutes, and carry out the smelting of ferromanganese. After the heat preservation is over, turn off the microwave and cool it down.

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Abstract

The present invention relates to a method for smelting a manganese-iron alloy by using microwave heating of manganese ore. According to the method, a microwave generator produces microwaves with a frequency of 2.45 GHZ, the microwaves are introduced into a reactor by using a metal waveguide, the microwave and raw materials for manganese-iron alloy smelting interact in the reactor, the raw materials for manganese-iron alloy smelting absorb microwave energy in the microwave field and the temperature is rapidly increased, an oxidation reduction reaction of manganese oxide and carbon is generated between the raw materials at a temperature of 700-1500 DEG C and is the heat absorption reaction, the microwave is continuously used to heat the reaction raw materials so as to provide heat for the reaction, the microwave field provides the promoting effect for the manganese oxide reduction reaction, and under the microwave effect, the manganese oxide is rapidly reduced so as to generate the manganese-iron alloy. Compared with the method in the prior art, the method of the present invention has the following advantages that the microwave heating is used to smelt the manganese-iron alloy, and advantages of rapid heating, short raw material heating time, energy consumption reducing and the like are provided.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for smelting ferromanganese alloy by heating manganese ore with microwaves, which has the advantages of fast heating rate, short heating time, reduced energy consumption and the like. Background technique [0002] Ferromanganese alloy is an important alloy for steelmaking, and it is used in the largest amount. It is an important alloy for improving the mechanical properties of steel. my country produces more than 30 million tons of ferroalloys every year, 98% of which are produced by submerged arc furnaces, that is, using submerged arc furnaces to heat ore and coke to high temperature for reaction. Submerged arc furnace heating uses electrodes to heat these raw materials to a high temperature and needs to be heated to above 1600°C, but these materials have low conductivity and heat transfer efficiency, the heating process consumes a lot of energy, the heating speed is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06
Inventor 刘建华刘建季益龙张游游闫永其杜建新
Owner UNIV OF SCI & TECH BEIJING
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